From: C Chan (cch.ccie@gmail.com)
Date: Thu Mar 06 2008 - 20:34:41 ARST
Hi all experts,
Any idea how to resolve the MAC flapping problem when turning on
vlan-bridging in switch?
I am doing IEWB Lab 17 task 1.5. The following problem is occurred.
When I performed further check, I found the flapping MAC address is coming
from SW3 CPU.
What is the problem? and how to address it?
Topology: SW1 <-eth-chan-> SW2 <-eth-chan-> SW3 <-eth-chan-> SW4
BR,
CH
*SW2 error*
SW2#
5d13h: %SW_MATM-4-MACFLAP_NOTIF: Host 0012.01ef.ad92 in bridge group 1 is
flapping between port Vl8 and port Vl23
SW2#
5d13h: %SW_MATM-4-MACFLAP_NOTIF: Host 0012.01ef.ad92 in bridge group 1 is
flapping between port Vl23 and port Vl8
SW2#
5d13h: %SW_MATM-4-MACFLAP_NOTIF: Host 0012.01ef.ad92 in bridge group 1 is
flapping between port Vl8 and port Vl23
SW2#
5d13h: %SW_MATM-4-MACFLAP_NOTIF: Host 0012.01ef.ad92 in bridge group 1 is
flapping between port Vl23 and port Vl8
*SW3 check*
SW3#s mac-add | i 0012.01ef.ad92
All 0012.01ef.ad92 STATIC CPU
*SW2# config*
bridge 1 protocol vlan-bridge
!
interface Vlan8
ip address 173.1.8.8 255.255.255.0
bridge-group 1
!
interface Vlan23
ip address 173.1.23.8 255.255.255.0
bridge-group 1
!
This archive was generated by hypermail 2.1.4 : Tue Apr 01 2008 - 07:53:52 ART